<!DOCTYPE html>
<html lang="zh-cn">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Title</title>
    <link rel="stylesheet" href="./css/03.css">
    <script src="./js/03.js"></script>
</head>
<body>
    <div id="div1">div1的默认内容值</div>
    <hr>
    <div id="div2">div2的默认内容值</div>
    <hr>
    <div id="div3">div3的默认内容值</div>
</body>
</html>